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# Interference Multiple Choice Questions p. 17

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## Interference Questions and Answers MCQs

MCQ: For destructive interference, the path difference is

odd number of half wavelengths
even number of half wavelengths
whole number of wavelengths
even whole number of wavelengths

MCQ: Electrical force exerted by two point charges on each other is inversely proportional to

sum of their charges
product of their charges
distance between them
square of distance between them

MCQ: Weakest force in nature is

electric force
gravitational force
weak force
magnetic force

MCQ: Unit for pressure used in weather maps is millibar. 1 millibar is equal to

1000 bar
100 kPa
100 Pa
1 atm

MCQ: Energy in deformed solid is called

stress energy
potential energy
kinetic energy
strain energy

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